[PATCH v4 03/20] blktrace: add definitions for BLKTRACESETUP2

Add definitions for a new BLKTRACESETUP2 ioctl(2).

This new ioctl(2) will request a new, updated structure layout from the
kernel which enhances the storage size of the 'action' field in order to
store additional tracepoints.

Reviewed-by: Damien Le Moal <[email protected]>
Reviewed-by: Martin K. Petersen <[email protected]>
Signed-off-by: Johannes Thumshirn <[email protected]>
---
 blktrace_api.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/blktrace_api.h b/blktrace_api.h
index 172b4c2..ecffe6e 100644
--- a/blktrace_api.h
+++ b/blktrace_api.h
@@ -139,9 +139,25 @@ struct blk_user_trace_setup {
 	__u32 pid;
 };
 
+/*
+ * User setup structure passed with BLKTRACESETUP2
+ */
+struct blk_user_trace_setup2 {
+	char name[64];			/* output */
+	__u64 act_mask;			/* input */
+	__u32 buf_size;			/* input */
+	__u32 buf_nr;			/* input */
+	__u64 start_lba;
+	__u64 end_lba;
+	__u32 pid;
+	__u32 flags;			/* currently unused */
+	__u64 reserved[11];
+};
+
 #define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
 #define BLKTRACESTART _IO(0x12,116)
 #define BLKTRACESTOP _IO(0x12,117)
 #define BLKTRACETEARDOWN _IO(0x12,118)
+#define BLKTRACESETUP2 _IOWR(0x12, 142, struct blk_user_trace_setup2)
 
 #endif
-- 
2.51.1